Improvement in machines for shearing metals



WILLlA M J. ADAMS. Improvement in Machines for Shearing Metal.

Patented May 2,1871.

idniirt Sitar WILLIAM J. ADAMS, OF GRAND RAPIDS, MICHIGAN.

Letters Patent No. 114,385, dated May 2, 1871 antedated April 22, 1871.

IMPROVEMENT m- MACHINES FOR SHEARIYNG METALS.

The Schedule referred to in these Letters Patent and making part, of the same.

To all whom it may concern Be it known that I, WILLIAM J. ADAMS, of Grand Rapids, in the county of Kent and in the State of Michigan, have invented certain new and useful Improvements in Power Shearing-Machines; and do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawing and to the letters of reference marked thereon.

The nature of my invention consists in the construction and arrangement of a power shearing-ma chine, as will be hereinafter fully set forth.

'In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, referring to the annexed drawing which forms a part of this specification, and in which- Figure 1 is a side elevation;-

Figure 2 is a front view; and

Figure 3 is a plan view.

Figure 4 is a side view of the device by which the movable part of the shears is drawn up out of the metal.

-A represents the base or bed-piece of my machine, from which rises the frame B, constructed in the peculiar form shown'in the drawing, having an opening near its lower end through which the bar of iron to be cut is inserted;

In the frame B, and projectingupward in this open- I ing, is secured the stationary knife a by means of the Within the frame B is placed a post,'E, which .moves vertically up and down in slots in the sides of thefi'ame.

The upper end of this post E is slotted, and in the same the journals of a cam-wheel, G, have their bearings. 1 This cam-wheel is constructed as shown in fig. 1, and might be called a spiral wheel.

The post E is pressed upward by means of a spring, H, so that the wheel Gr will bear against the shaft d and be revolved by friction.

At the lower end-of the post E is secured the knife or cutter a.

The shaft (I, being revolving, revolves at the same time the cam-wheel G, which forces the post E downward until the cutters a a have cut the bar of iron inserted between them. At this point a pin, e, in the side of said wheel, strikes a pin or lug, i, on the inside of the frame B, when the cam-wheel, of course, must stop until it and the post are lifted up to clear the pin e from the lug The spring 11 not being strong enough to accomplish this object, as the cutter a will invariably stick more or less in the metal, I have provided the following device:

On the side of the post is pivoted a lever, -I, with a hook at its upper end. This lever is, by a spring, f, pressed against the journalto of the cam-wheel G, which is squared off on one side; and on the shaft at above is formed a catch or tooth, h, as shown in fig. 4. The post'E having been forced down to its lowest point and the wheel G stopped by the lug i, which happens just as the offset k on the circumference of the cam-wheel has cleared the shaft (1, and when the square portion of the journal to is against the lever I, then the catch h on the shaft will engage with said hooked lever I andforcibly draw the post up, removingthe cutter from the metal. The spring H then would, if not prevented from doing so, resume its function to throw the cam-wheel against the shaft, and the same operation would be continued.

' But if the machine is continually in operation the power it exerts would not be so great as if it only operated at intervals, the shaft 11 being, however, kept in continual motion, because in this case the power is, so to say, stored up for use when required.

The impetus'of the wheel 0, which it has obtained while the cam G is not in contact with the shaft, adds largely to the power of the machine when said cam is suddenly brought into such contact.

As above described, it is by means of the spring H that the post B is thrown upward to bring the surfaces of the cam-wheel and shaft together. To prevent this spring from exercising this power I provide, in the base A, a foot-lever, J, connected by a rod, in, with a pivoted cam or lug,'n, within the frame B, above said spring.

A spring, 12, arranged under the foot-lever J, throws the same up and causes the cam n to bear down upon the spring H, and, consequently, said spring does not exertany influence on the post E.

When the foot-lever J is pressed down the earn a is tnrnedaway from .the spring H; which is then allowed to raise the post up.

On the side of the frame B, at the opening where the bar of iron is introduced, is placed a slotted adj ustable' guide-plate, s, as shown in fig. 1. i

This machine may be readily altered andadapted to the punching of metal by removing the guide s and the cutters a a, and'substituting therefor the guideplate t and punch and die 3/ 2:, represented in fig. 5.

Having thus fully described my invention,

sulfaced rotating journal 10, and the tooth h on the shaft 01, substantially as and'for the purposes herein set .forth.

3. The foot-1ever J, spring 1), rod m, and cam 01, arranged and operating with the spring H and post E, substantially as and for the purposes herein set forth.

14. The combination of the base eA, frame B, shaft d, fly-'whee1 0, post E, earn-wheel G, springs f and H lever I, the-flattened journal w, and foot-lever J wi'ti the spring cam n, all constructed and arranged witl their several connections, substantially as and for the purposes herein set forth.

In testimony that I claim the foregoing I have here 3131;}; set my haniithis 9th day of September, A. D.

-- WILLIAM J. ADAMS.

Witnesses: THOMPSON SINCLAIR, A. P. SINCLAIR. 

